Safety-jack.



W. LORENZ. SAFETY JACK. APPLICATION FILED MAR. II.' 1917.

Patented July 10, 1917'.

m 6 a n m 0 u m H h i z WENT? T 4 1 m m T m 0 7 ad TINTTTJD @TATES PATENT UTTI@E,

WILLIAM LORENZ, 0F BROOKLYN, NEW YORK, ASSIGNOR OF ONE-HALF T0 ERNEST KRETH, OF NEW YORK, N. Y.

SAFETY-JACK.

Specification of Letters Patent.

Patented July I0, 1917.

Application filed March 17, 1917. Serial No. 155,508.

To all whom it may concern.

Be it known that I, WILLIAM LORENZ, a citizen of the United States, residing in Brooklyn, county of Kings, city of New York, State of New York, (whose post-office address is care of Ernest Kreth, 133 Carlton avenue, Brooklyn, N. Y.,) have invented a new and useful Improvement in Safety Jacks, of which the following is a specification.

The object of my invention is to provide a safety jack which will properly support one end of an axle of a vehicle and prevent the vehicle from shifting or moving in any way when so supported so that under no circumstances will the shifting of the vehicle injure any person who may be working on the same. A further object is to provide a simple and durable apparatus which is not liable to get out of order. These and further objects are accomplished by my in vention, one embodiment of which is heretofore more particularly set forth.

Referring to the drawings, forming a part hereof, Figure 1 is a side elevation of my improved jack with parts in section.

Fig. 2 is a plan view of this jack.

Fig. 3 is a sectional view taken on the line 3-3 of Fig. 1 looking in the direction of the arrow.

Throughout the various views of the drawings similar characters designate similar parts.

My improved jack 1 is provided with table 2, which is supported by the downwardly and outwardly extending legs 3, which support it in such a manner that it will not shift under the normal conditions of use to which it may be subjected. Depending from the sides of the table 2 are suitable parallel brackets 4, which are joined at their lower ends by a connecting bolt 5, on which is fulcrumed a lever 6. The free end of this lever 6 is a handle 7 and over its other end is a lift 8 which slides vertically through an extended opening 9 in the table 2 and the top of this lift 8 is provided with a suitable bracket 10, which is preferably made of metal and s0 shaped as to receive an axle or other part of the vehicle and hold the same so that it cannot slide off in a direction parallel to the axis of the table 2. The preferred form of bracket 10 is shown, although. its shape may be varied as desired. The bracket 10 on the lift 8 is held at any desired elevation by the lever 7, which in turn is locked in position by means of the wedge 11, which is placed between this lever and the table 2 and near the handle 7. A chain 12 prevents this wedge from being lost or misplaced, and always keeps it where it is accessible when wanted.

In view of the foregoing the operation of my improved safety jack will be readily understood. The wedge 11 is withdrawn, the handle 7 raised, and then the lock 8 falls until the clamp 10 is adjacent to or on the upper level of the table 2. The bracket 10 is then placed under an axle not shown, and the handle end of the lever 6 is depressed and the axle thereby raised, and when in the upper position the wedge 11 is shoved true, as indicated, and then the vehicle is securely held. The base of the jack 1 is so large because of the spreading of the legs 3 on the side of the table 2 that the vehicle will not shift when the jack is in use, and the jack will hold the vehicle as long as desired. The jack may be easily removed by pressing downwardly on the handle 7 and withdrawing the wedge 11, and

then permitting the lift 8 to be lowered.

Having thus described my invention what I claim is:

A safety jack having a table with spreading legs adapted to give the jack a large base, depending brackets from said table, a fulcrum connecting said brackets, and a lever mounted on said fulcrum, a lift adapted to be raised by said lever and a wedge between the lever and table which is adapted to hold said lever in place.

In testimony whereof I hereby set my hand thi 14th day of March, 1917.

WILLIAM LORENZ.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. G. 

